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Interfacial contributions in lignocellulosic firber-reinforced polyurethane compositesAuthor(s): Timothy G. Rials; Michael P. Wolcott; John M. Nassar
Source: Journal of Applied Polymer Science 80:546-555
Publication Series: Miscellaneous Publication
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DescriptionWhereas lignocellulosic fibers have received considerable attention as a reinforcing agent in thermoplastic composites, their applicability to reactive polymer systems remains of considerable interest. The hydroxyl-rich nature of natural lignocellulosic fibers suggests that they are particularly useful in thermsetting systems such as polyurethanes. To further this concept, urethane composites were prepared using both unused thermomechemical pulp and recycled newsprint fibers. In formulating the materials, the fibers were considered as a pseudo-reactant, contributing to the network formation. A di-functional and tri-functional poly(propylene oxide)-based polyol were investigated as the synthetic components with a polyol-miscible isocyanate resin serving as a crosslinking agent. The mechanical properties of the composites were found to depend most strongly on the type of fiber, and specifically the accessibility of hydroxy functionality on the fiber.
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CitationRials, Timothy G.; Wolcott, Michael P.; Nassar, John M. 2001. Interfacial contributions in lignocellulosic firber-reinforced polyurethane composites. Journal of Applied Polymer Science 80:546-555
KeywordsWood fiber, polyurethane, composite, interphase, dynamic mechanical analysis
- Interfacial contributions in lignocellulosic fiber-reinforced polyurethane composites
- Highly filled formaldehyde-free natural fiber polypropylene composites
- Crystallization behavior of polypropylene and its effect on woodfiber composite properties
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